Automatic firearm.



No. 814,547. PATENTED MAR. 6, 1906.

R. H. KJBLLMAN.

AUTOMATIC FIREARM.

' APPLIOATION IILED AUG. 3, 1905.

' 8 SHEBTS-SHEET 1.

No. 814,547. PATENTED MAR. 6, 1906. R, H. KJBLLMAN. AUTOMATIC FIREARM.

APPLICATION FILED AUG 3 1905 8 SHEETSSEET 3.

r; I J 6 113i??? I PATENTED MAR. 6, 1906. R. H. KJELLMAN. A AUTOMATIC FIREARM.

APPLICATION FILED AUG. 3, 1905.

8 SHEETS-SHEET 4.

I PATENTED MAR. 6, 1906. R. H. KJBLLMAN. AUTOMATIC FIREARM.

APPLICATION FILED AUG. 3. 1905.

8 SHEETS-SHEET 5.

k M I 1.

ZZZ/Zara,

PATENTED MAR. 6, 1906'.

R. H. KJELLMAN.

AUTOMATIC FIREARM.

APPLICATION FILED AUG. 3, 1905.

' a SHEETS-SHEET 6.

Wimmwr fif PATHITED Ill. 6, 1906.

R. H. KJELLMAN. AUTOMATIC FIREARM.

APPLICATION FILED AUG. 3 1905.

8 SHEETS-SHEET 7.

PATENTED MAR. 6, 1906.

R. H. KJELLMAN. AUTOMATIC FIREARM.

APPLIOATIOI T FILED AUG. 3, 1905. v

8 SHEETS-SHEET 8.

Ern /Z2? "UNITED STATES PATENT OFFICE RUDOLF HENRIK KJELLMAN, or STOCKHOLM, SWEDEN, nssreNoa TO. 7

AKTIEBOLAGET STOCKHOLMS VAPENFABRIK, or STQCKHOLM, g

SWEDEN.

- AUTOMATIC FIITREARM.

Patented March 6,1906.

Application filed Au ust 3.1905. S rial No. 212,559.-

To all whom it may concern: 7

Be it known that I, RUnoLF HENRIK KJELLMAN, engineer, a subject of the King of Sweden and Norway, residing at 37 Handtverkaregatan, Stockholm, in the Kingdom of Sweden, have invented certain new and useful Improvements in and Relating to Automatic Firearms, of which the following is a specification.

This invention relates to automatic fire arms, particularly to rifles of the straight-pull type in which the recoil of the barrel provides the necessary energy at each discharge for actuating the breech mechanism and performing the various operations necessary for reloading the gun and rendering it ready for.

afresh discharge. 7 I

- According to this invention the barrel and breech-bolt recoil together for a certain distance against the resistance of the recoilsprin Then the bolt is unlocked from the barre and continues its recoil movement (without the barrel) against the resistance-of a return-spring, which is restrained from re- "the barrel a fresh cartridge which has be'en magazine through an opening in ghe ll pper.

ymeans o a c 1p,as-

previously raised into position in front of: the bolt by the action of the cartridge-lifter of the magazine;

The extraction orwithdrawal of the empty cartrid e case from the breech-chamber is effecte by an ordinary extractor and takes place during the independent rearward movement of the bolt. The ejection of said empty case takes place as the barrel advances to its firing position.

The cartridges are'contained Within a detachable magazine which is adapted to fit into anopening in the und er side of the breechframe, said cartridges being supplied to the side of the breech-frame is well understood.

The firing-pin is retained in its cocked po a lever having a sition by a scar, which is indirectly connected with the triggerthrou h the intervention of ferenceof leverage thus provided enables the pull off to be more satisfactorily effected than heretofore.

In order to enable the breech mechanism to be readily reached for inspection, cleanin or repair, the butt, and the stock of the ri e are made separable, the butt carrying, the

non-recoiling parts and the stock the recoil- .ing parts of the mechanism. The separable butt and stock are locked to ether by a transverse spring-pin,which can be unlocked by a cartridge-case or other suitable implement. I w

The firearm can be fired as an ordinary magazine-rifle, if required,*a suitable actuating-handle being furnished for this urpose on the breech-block or apart carried t ereby. A device may be provided for enabling the amplitude of the recoil movement of the barrel to be reduced when the firearm is being thus used. Suitable means 'may also be provided for enabling the firearm to work and re entirely automatically-or to work as a sin le firer, as desired.

n orderl hat the said invention may be clearly understood and readily carried into effect, the'same will be described more fully with reference to the accompanying drawings, in whichdouble fulcrum. The dif- Figure 1 IS'flSlflG elevation, and Fig. 2 a I plan, of a rifle constructedin accordance with this invention, a portion of the butt and the stock being broken away. Figs. 3 and 4 are side elevations of the stock and the butt separated from each other. Fig. 5,.is a'longitudinal central section of-the frame or casing which is carried by the butt. Fig. 6 is a longitudinal central section of the breech-frame that forms part of the barrel. Figs. 7, 8, and 9 are respectively a side elevation, a vertical central section, and a horizontal central section, of the breech-bolt. Fig. 9 is a sectional plan of a detachable end plate with which the breech-bolt is provided, as hereinafter described. Figs. 10, 11, and 12 are vertical sections of the com lete breech mechanism with the parts in tliree different positions, Fig. 10 re resenting said parts when the rifle has .been the barrel and breech-block have fully recoiled, and Fig. 12' when the barrel hasre- 7 ed but before recoil, Fig. 11 when a turned to firing position and the breech-bolt is still retracted. Fig. 13 is a horizontal section taken approximately on the line 1 1 of Fig. 10. Figs. 14, 15, 16, 17, and 18 are transverse sections taken, respectively, on the lines 2 2 and 3 3 of Fig. 11, on the line 4 4 of Fig. 12, and on the lines 5 5 and 6 6 of Fig. 10. Fig. 19 is a cross-section taken approximately on the line 7 7 .of Fig. 10, showing the transverse springpinfor detachably connecting the butt to the stock of the rifle. Fig. 20 is a transverse section taken approximately on the line 8 8 of Fig. 10, showing the device employed for enabling the amplitude of the recoil movement of the barrel to be reduced when the firearm is to be used as an ordinary magazine-rifle. Fig. 21 is a transverse section taken approximately on the line 9 9 of Fig. 11, illustrating the cartridge extracting and ejecting device. Figs. 22, 23, 24, and 25 are detail longitudinalsectional views taken approximately on the line 10 10 of Fig. 14, illustratin the parts that cooperate for locking and li crating the barrel and breech-bolt during the worki of the rifle, as hereinafter more fully desci' ihed. Fig. 26 is a transverse section taken approximately on the line 11 11 of Fig. 25. Figs.27, 28, and 29 are detail views showing the trig er mechanism in the position it assumes be ore, durin and after the pulling of the trigger.

n all the figures like letters of reference indicate similar parts.

A is the barrel, which is adaptedto recoil in the stock B of the rifle against a recoilspring A and which has a rearwardl -extending breech-frame A, suitably gui ed in grooves or the like formed in a casingC, fixed to the butt D of the said rifle.

E is the breech-bolt, which is adapted to also in the said casing C.

A is the sprin for returning the breechbolt to its forwar position. i, F is the firing-pin or striker, whichis carried by the breech-bolt, and F is the mainspring, which is com ressed by-the' rearward move-" ment of the ring-pin and operates to propel it forward to fire the cartrid e.

A is the cocking-arm, w 'ch-isipivotally mounted in a depending. lug A" ='-onv the.

breech-frame of the recoiling barrel.;' The lower end of said cocking-arm is ada ted to.

strike against a fixed abutment C on t e-floor of the said casing C whenthe barrelrecoils and by turning about its pivot brings its upper end into en agement with lateral projections F? onthe ring-pin and retracts the latter, so as to cook it in the well-known manner. with a lateral handle ing-pin and the breech-bolt to be retracted by hand. At its forward end the said breechbolt carries pivoted lateral locking-levers E E, having heads for engagement with corree The said firingin is also furnished. 3 for enabling the fi1 sponding recesses in the breech-frame of the ing the bolt to'and from the barrel forms no part of the present invention.

G is the trigger.

H is a non recoiling spring controlled catch (see Fi s. 22 to 26) which is mounted on the floor o the casing C and which is furnished with three projections h h it so arranged that as thebarrel completes its recoil movement, which is comparatively short, a nose 0, on the under side of the breech-frame of the barrelwill become en aged with the projection 72/, Fig. 23, and e thereby restrained from returning, while the breechbolt' continues its recoil movement under the momentum acquired during the recoil of the barrel. -As the breech-bolt completes its independent recoil movement it causes, an incline e thereon too erate upon the proj ectien h of said catch an to thus depress the latter, thereby disen aging the pro ection h from the nose at of t e breech-frame, so as to liberate the barrel and-permit it to return to the firing position under the reaction of the recoil spring. Almost. simultaneously with Y 4 previousl depressed by the aforesaid incline e on the olt, so that then the bolt in turn becomes held retracted whilethe barrel advances. As the barrel completes its advance 'movement. it brings a double-inclined lug a on one of the side lates of the breech-frame into contact with t e pro'ection 71 of the .said

catch, Fig; 25, whereby t e latter is again deressed, and thus removes the projection h om. engagement with the notche. of the breech boltis 1 .Thesaid bolt-is thus liberated and advances nn'denthe reaction of the return-springA to close the.breech, Fig. 22..

.Dur ng' the independent recoil movement iofgtthe .breech-boltgthe, empfty' cartridge-case {is} extracted from :the' barrel: .by'an ordinary extractor-claw e whichis situated at the up- I per. side of. the bolt, the initial or early part of the extraction for loosening the cartridge in the breech chamber occurring while the breechI-bjolt is under the influence of the cock in warm A As ,the barrel advances after being liberated from the projection h of the spring; controlled catch by the rearward breech-frame, comes forcibly against the base of the extracted cartridge-case at a point op- 1 o;

' which purpose it gage with a tical guide-ribs for engagement with corre sponding grooves in the body of the breech-' bolt, the said end plate being retained in place by a rearwardly-extending pin 6'? on the coverplate e entering a recess in the said end plate a. The cover-plate e is capable of sliding on the body of the breech-bolt, for

web e", provided with ribs for engaging with corresponding longitudinal grooves in the body of the breech-bolt. It'also has at'its forward end a projection. e for engaging with a groove formed- 1n a guide-piece on said bod v. The mainsprin bears at-its rear end against the rear end 0 the said 'hollow web a and at its forward end against a shoulderf on the firingpin. In order to detach the aforesaid end late e, the said cover-plate e is slid forwar ly a short distancH. 0., far enough for its pin e to become disen aged with the said recesswhereupon sai end plate can he slid downward out of place. After the said end plate has been detached the cover-plate e can be slid rearwardly, together \\'if h the firing-pin F and the mainspring F, all of which parts can then be 'detachcd.

The socket-piece e of the end plate has a cavity at its lower part-for the sear cf, which is adapted, by means of a spring-0 to enbent f on the firing-pin when the latter is retracted, and to thus retain it cocked. The sear is in the form of a lever having semicircular shoulders a engaging with corresponding'recesses, about which it can turn. On its under side is a tooth e with which when the breech-boltis in its fully-advanced or breech-closing position enga es a corresponding tooth'a at the upper en of a movable intermediate piece a, mounted in a cavity formed for its reception in the rear part of the dependinglug A car'- ried by the breech-frame of the barrel. At its lower end this intermediate piece has a lat eral tooth a, Fig; 6, which engages with a re cess g, formed at the forward end of the lever g Fi s. 27 to 29. This lever has a tailpiece g w ich lies immediately above the free end of a finger g forming'part of the trigger G, which is pivotally mounted on a transverse inv 9 The said lever g has, as already stated, double fulcrums-onefulcrum at g and the other at g-and it is normally kept with its forward end pressed in an upward direction by a spring 9 The fulcrum g is situated at the "forward end of said lever andv consists of a lateral pin, which normally bears against a fixed oint g under the 1nfluence of the said spring 9 The other fulhas at its rearpart'a hollow cruni g is situated near the middle of. the

lever and consists of a transverse fixed pin, passing through a somewhat elongated hole 7 r or segmental slot of the lever. With this arrangement when the trigger is pulled to fire the rifle the said lever 9 turns first.

about its forward fulcrum g, thus causing the forward end of the lever to move through, an are described about the axis of the fulcrumin 5 and the intermediate iece a and the P 9 1- sear e to be actuatedto a small extent dur ing the first part of the levers movement.

'When said level has moved far. enoughto bringthe lower end of its aforesaid elongated hole or segmental slot into contact with the 1pLin g", the latter becomes the fixed point or ilcrum' about-which the lever turns, thus enabling the saidforward 'end of the lever.

to move through an increased are described "about the axis of. the fulcrum-pin 9 during the last part of the motion of the said lever in actuating the sear. vThedifferenceof leverage thus'providedenables the pull off to be more satisfactorily effected than hereto fore. 1 H

The aforesaid intermediate piecea, is not only adapted to move vertica, ly in its cavityunder the action of, the trigger-lever g,

but it also participates in a certain amount of lateral motion against the pressure of a light spring a so that when the trigger is kept'pulled' after firing the tooth a of said intermediate piecewilllie out of the path of the tooth e of the sear e", and thus require 'that the trigger shall be released in order to bring about the reengagement of theteeth a e and enable the rifle to be again fired.

The pin 9 is furnished with a radialprojection .and with an external arm 9 which works over an arc-piece g at the side of the.

rifle-butt. By shifting said arm in a rearward direction the radial projection can be caused to assume a position to preventfthe trigger from being pulled, and thus constitutes a safety device. The said arc-piece g has a 'notch g 'for a spring-tongue g1, Fig.

17, on the back of the arm 9 to get behind the said arc-piece when the parts are being assembled, and thus to retain said arm 9 and pin 9 in place. The position of this notch gy is such that'the said spring-tongue cannot be brought opposite theretounless the screws securing the casing-c to the butt are unscrewed to allow the butt to be lowered enough to allow the spring-tongue g on the I .arm g to pass underneath asmall lug on the rear side of the arc-piece g and be brought in position opposite the notch 9 in which position the thereto, can be detached. Unintentional detachment of the said pin 9 is thus avoided,

In order to detach the breech-bolt from the breech-frame, a pivoted latch e Fig. 17, is provided at the rear end of the bolt. This -latch normally engages with a notch a,

arm 9* and the pin g, connected all the other recoiling parts of the rifle, i'sfur- [nished with the transverse springepin b, Fig.

' its spring under the pressure of the U-shaped 2 5 portion acting upon the inclined head b and 6, in the piston or plunger'a ',which is under the influence of :thereturn: spring A By shifting said latch outward it can be disen.-.

wgaged from the-springrpiston 0. 9 and thus permit the breech-bolt to be removedrearwardly fro'mthe breech-casing.

' The stock B, whichoarries the barrel and 19', theopposite ends of which are adapted to engage with corresponding apertures in the U-shaped portion .0 of the casing 0, which (together with the non-recoiling parts of the rifle) is carried by the butt D." One endof the said pinb has a head'b formedWithIan' V incline b and the other end has aflattened part b.- The sp'ringfb normally tends to keepthe pin with itshead b. in an outward position; as shown in Fig. 19. "Therefore when the U-shaped portion'c of the butt is fitted to'the portion a of the stock and these partsare first slide mwardlyagainst the resistance of will then regain its outward position bythe reaction of the springbffwhen the aforesaid apertures come opposite the ends of said pin. The butt andstock will then be locked together, but in such a manner that they can be readily separated when required by merely pushing inward the aforesaid pin 6 by a cartridge-case or other readilyaccessiblev implement. In order to assist in keeping the connectedparts firmly together, the position of the forward end of the recoil-spr ng A relatively to the'bracketA. is such that said spring will be somewhat compressed by the pressure of thelug thereon due to thepushing together of the butt and stock in the act of connecting these parts. The recoilspring will therefore exert a certain amount of forward pressure which will prevent any looseness existing between the said buttand stock.

For the purpose of reducing the amplitude of the recoil movement of the barrel when thefirearm is to be used as an ordinariyinagazine-rifle the barrel is provided with a ring a I thumb-piece a).

Fig. 20, fitted into a circumferential groove in said barrel. This ring has a lug a" and a position in which the lug isangularly shifted into a position to come'in front of a fixed abutment a on the stock the extent of the recoil of the barrel will belimited by the distance existing between said lug and abutment.

shifted into a position to bring the lug to one side of the abutment, as shown in Fig. 20, the barrel will be free to recoil without impediment from the abutment and will consequently perform its full recoil movement, as is required when the firearm is to work automatically. I

pushed together thefsaid pin will;

Byturning said ring'into a When the said ring is angularly' What I claim, and desire to secure by Letters Patent of the United States, is

r 1. In an automatic firearm, the combination with the recoiling barrel, the recoilspring, the breech bolt, and the returnspring; of means for locking the barrel after it and the bolt have recoiled, means for un: locking the bolt from .the barrel andpermit- .tingit-to. continue its rearward movement independently of the barrel and extract the empty cartridge-case, means for locking the :bolt 1n its retracted position and releasing the barrel, means for enabling the barrel to I eject theextracted cartridge-case as said barrel advances to. its forward position, means for enabling the'barrelto release 'thebolt' as said barrel advances, and means whereby the .bolt in moving forward to close the breech introduces a fresh cartridge into the barrel substantially as described.

2; In an automatic firearm, the combine tion with .the recoiling barrel, the recoil- SIpring, the breech-bolt" and the returnspring; of a non-reooiling spring-controlled catch, means whereby the barrel in completing itsrecoil movement will be engaged and held by said catch mean s whereby the breech-boltin completing its independent rearward movement will disengage said catch from the barrel and itself become engaged and held by said catch, and means-whereby the barrel in com leting' its forward movement disengages t e catch from the bolt to permit'the latter to advance and close the breech substantially as described.

'3. In an automatic firearm, the combination with the recoiling barrel, the recoilspring, the breech-bolt, and the returntoo spring; of a non-recoiling spring-controlled catch provided withthree projections, one of which cooperates with the barrelin its recoil inorder to restrain its return, another of which cooperates with the breech-bolt in orderto liberate the barrel and restrain tne return of the bolt, and the other of which cooperateswith the barrel" to release the bolt as rel and which is movable with the barrel and adapted to hit or miss said'non-recoiling stoppiece in accordancewith its angular adjustmen-t'for the purpose specified.-

'6. In an automatic'firearm, the combination with the stock carrying; the recoiling parts of the mechanism and the butt carrying the non-recoilin parts of said mechanism, of a transverse y movable spring pin for readily se arating and reconnecting the said stock an butt for the purpose specified.

7. In an automatic firearm, the combination with the detachable stock and butt, of a transversely-movable spring-pin carried by the stock and adapted to engage with apertures in the butt, an inclined head on said spring-pin for enabling the butt to depress the spring-pin in the act of bringing said butt and stock together, and means whereby the recoil-spring is slightly compressed during such bringing together of the stock and butt substantially as described.

8. In an automatic firearm, the combination with the tri ger, of a spring-controlled lever having one lcrum near its middle and another near its forward end, and means whereby the lever will turn about its forward fulcrum during the first part of the triggers movement and'will turn about its middle fulcrum during the last part of the triggers lever'having a fulcrum-pin near its middle and another near its forward end, the said middle fulcrum-pin extending through an elongated opening in the lever-for enabling lost motion to take place at this point during the first part of the triggers movement for the purpose specified. I I

In testimony whereof I have hereunto set my hand, in presence of two subscribing witnesses, this 27th day of June, 1905.

RUDOLF llENRlK KJELLMAN. Witnesses:

FRITZ LEBAHN, GUST. MOBE 'Y. 

